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Effects of intermittent loading on fatigue life of a high strength steel in very high cycle fatigue regime
Sun CQ(孙成奇); Song QY; Hu YP(胡远培); Wei YJ(魏宇杰)
Source PublicationINTERNATIONAL JOURNAL OF FATIGUE
2018-12-01
Volume117Pages:9-12
ISSN0142-1123
AbstractAn intermittent loading path (i.e. a pause duration follows after a loading pulse) is broadly employed in a ultrasonic fatigue test to minimize the effect of self-heating in specimens. The exact influence of such intermittent loading strategy remains elusive. We report here a significant fatigue life improvement of a high strength steel in very high cycle fatigue regime subjected to intermittent loading, in contrast to that without the pause duration although the crack initiation mechanism remains the same. This phenomenon is attributed to the strain aging by the numerous low stress amplitude cycles under intermittent loading, which strengthens the local region ahead of the initiated crack tip by the former high stress amplitude cycles and improves the fatigue life.
KeywordVery high cycle fatigue High strength steels Intermittent loading Ultrasonic fatigue technique
DOI10.1016/j.ijfatigue.2018.07.033
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000449240200002
WOS KeywordLOW-CARBON STEEL ; METALLIC MATERIALS ; FREQUENCY ; BEHAVIOR
WOS Research AreaEngineering, Mechanical ; Materials Science, Multidisciplinary
WOS SubjectEngineering ; Materials Science
Funding OrganizationNational Natural Science Foundation of China [11572325, 11425211] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB22040503, XDB22020201, XDB22020200]
Classification一类
Ranking1
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78137
Collection非线性力学国家重点实验室
AffiliationChinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China; Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Sun CQ,Song QY,Hu YP,et al. Effects of intermittent loading on fatigue life of a high strength steel in very high cycle fatigue regime[J]. INTERNATIONAL JOURNAL OF FATIGUE,2018,117:9-12.
APA 孙成奇,Song QY,胡远培,&魏宇杰.(2018).Effects of intermittent loading on fatigue life of a high strength steel in very high cycle fatigue regime.INTERNATIONAL JOURNAL OF FATIGUE,117,9-12.
MLA 孙成奇,et al."Effects of intermittent loading on fatigue life of a high strength steel in very high cycle fatigue regime".INTERNATIONAL JOURNAL OF FATIGUE 117(2018):9-12.
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